I've got a toddler from hell!

DD2 has developed an impressive new skill this week.
She’s taken to kneeling down, banging her head on the floor and screaming like a constipated pterodactyl if she doesn’t get her own way.
I think this is what they call the “terrible twos.”
Which is odd, because she isn’t even 14 months old yet.
Trust me to get an early starter.
I don’t really think you’ve lived properly until you’ve experienced your child doing a “publicly executed toddler tantrum.”
Preferably in a quiet restaurant or the busy bacon aisle at Tesco.
Nothing can compare with the utter cheek flushing humiliation of trying to control a small person who suddenly develops the strength of about ten Arnold Schwarzeneggers because she’s dropped her cuddly Iggle Piggle.
You’re always aware of the disapproving stares of onlookers, or the folk who do a “comedy wince” and mutter something about “toddlers from hell.”
And then there are the people who seem to think they can “help.”
DD2 went into full tantrum mode at toddler group the other day because another kid had decided he wanted to play with the plastic sausage she’d been monopolising all morning.
Rolling on the floor, screaming, kicking, punching, swearing (well, the babbling equivalent) - we had it all.
Another mum tutted helpfully: “Ooh, she has got a temper on her - you better get that sorted.”
Well, you don’t say!
I resisted the urge to smack her one in the face and instead smiled pathetically: “Yeah.”
What exactly am I supposed to do then?
Naughty steps are out at this stage because she has no idea what naughty means and can’t sit on a step without falling off it.
It’s also a bit too soon for reward charts, distraction techniques and all those other Jo Frost specials.
So you know what I do?
Give her a biscuit. Works every time.
You don’t think I’m doing this parenting thing wrong do you...?